Doorcheck



A. SWANSON DOORCHECK Filed Jan. 26, 1924 Feb. 1:7. 1925.

Patented Feb. 17, 1925.

UNITED STATI-:s

PATENT OFFICEa ALFRED SWANSON, OF BILLINGS, MNTANA, ASSIGNOR OF ONE-IIALF T0 JAMES i HOWARD LESH, Ol? BILLINGS, MNTANA,

DOO'RCHECK.

Application ledJanuary 26, 1924. Serial No. 688,733.

To all whom t may concern.'

Beit known that I, ALFRED SwANsoN, a citizen of the United States of America, residing at Billings, in the county of Yellowstone and State of Montana, have invented certain new and useful Improvements in Doorchecks, of which the followingis a specification.

My invention relates to new and useful improvements in door checks and has for an object to provide a check which is compara tively simple in construction, positive in operation and relatively cheap to manufacture.

Most of the door checks which are in use today are operated by springs and a dash pot, the dash pot regulatinor the force with which the springs operate. Phe valve on the yd'aslr pot soon wears and calls for constant repair.

The other forms of door checks which are operated by springs with which I am familiar, are comparatively complicated, calling for a number of parts and constant repair.

`One of the principal objects, therefore, of my invention is to provide a door check utilizing a minimum number of parts; namely,

`a suitably mounted rack and gear, a spring attached t0 the gear, a link attached to the rack, and an arm attached to the door and cooperating with the link. Y

Still another object of the invention is to provide a door check wherein the opening of the door will cause the rack to move outwardly and thus tighten the spring on the gear. After the door has been released, the A4spring will cause therack to return and pull the door to its closed position. A small brake is attached to the check which by friction regulates the speed of the return of the rack to its normal position. i Still another object of the invention is to provide a door check which may be used either on a right-hand or a left-hand door, it being simply necessary to reverse the position of the lmk on the rack and place the brake on the other side of the door check proper.

Vith these and other objects in view, the invention consists in certain new and novel arrangements and combination of parts as will be hereinafter more fully described and pointed out in the claims.

Referring now to the drawings showing a preferred form of my invention, there is shown in f Fig. l the fragmentary portion of a door and door case, the door check proper being secured to the lintel and the arm cooperating with the door check being secured to the top rail of the door.

F ig. 2 is a. top plan view of the door check as attached to the door and casing, a portion ofthe door case being broken away for the sake of clearness, the door being shown in its closed position.

Fig. 3 is a fragmentary top plan View, the door being swung to an open position `and the check being shown in its operative position.

Fig. 4 is a fragmentary portion of the door check with the front part of the casing removed to show the rack and gear; and

Fig. 5 is a similar view,`but with the gear removed to show the spring for operating the gear and rack.

Referring now more particularly the several views, there is shown the door case comprising the lintel 1to which is secured the door check proper 2, which comprises a f metal casing 3, at one end of which is` formed the chamber' l for the reception of a gear 5 which is positioned to mesh with a rack bar 6 which may slide within the casing as may be seen in the several lfigures. Lugs 74 are positioned at different points on the opposite sides of the casing so that the door check may be screwed to the lintel l and securely held in place. These lugs, as before mentioned, are placed on the opposite sides of the casing so that the door check. may be used on either .a right-hand or left-hand opening door.

Also on the opposite side of the casing and preferably at the end where the chamber is located, are two small holes 8, one of each whether the checlr is used on a right-hand or left-hand. door.

Passing out one end of the casing, is an end 13 of the rack bar G on which is to be fastened the link 1&1-, the link being provided with a bearing surface to tightly lit the end 3 of the rack bar while the slot l5 extends practically its entire length. rlhis linl; may be easily removed when desired and reversed as to position so that it may operate likewise either on a right-hand or lett-hand opening door.

Supporting the gear y5 in its correct po- Sit-ion Within the chamber is the shaft lo, the gear being fixedly attached thereto, and also fastened to this shaft and to a pin i? is the coil spring 18 under compression, so that it Will force the rack to its normal position, after the rack bar has been pulled partly out of the casing by the operation oi' the door as will be hereinafter mentionet The compression of the spring will be adjusted when the parts are assembled and of course a movement of the rack bar tends to more tightly compress the spring. The operation of a spring operated gear and racl-l; bar is so well-known that no rurther ez;- planation is deemed necessary.

Cooperating with this link is the arm lt" which is securely fastened at its one end to the foot or base plate Q0, which may be of the shape shown, so that it may be seciufely fastened to the top rail 2l of the door. This arm, as may be seen in l and 2l, er.- tends iirst outwardly and then upwardly, and passes through the slot i5 ot' the linlt. Also fastened on this arm above the link is a stop nut 22 which may be held in place by the set screw 23.

The operation-of the device is exceedingly simple. An opening of the door will cause the arm to slide outwardly in the li Jihe same time pull the raclf: bar outwardly of the casing, and further compressing the spring 18, so that the arm and rack bar will assume the position shown in Fig. 3. @n releasing the door, the spring operatef gear will pull the rack bar inwardly and lil-:ewise pull the door to its closed position speed of the closing of the door bei lated by the wing nut l2 of the bi From the foregoing, it will be seen t the door check is comparatively simple, contains but relatively few parts, calls for but little attention, and may be readilj.-v placed in its operative position.

Many slight changes might be made in the. several parts Without in any way departing from the spirit and scope of my invention.

Alaving thus described my invention, what l claim as new and desire to secure by Letters Patent is l.. A door check comprising a detached arm, a slidable member, a link cooperating with said arm and said slidable member, saidy lnk. extending at right angles to the slidable member and spring operated means for returning said slidable member to its normal position after the same has been operated by the inovcnient of a door.

2. A door check comprising a detached mm, a rack bar, a link cooperating with said Arm and said raclrbar, said link extending at an angle to the said rack bar, a gear for operating said rack bar and a spring holding said gear under tension and said gear returiiingthe saidrack bar to its normal position after the same has been operated by a door.

3. i-l. door check comprising an arm adapted to be sccuredto a door, a casing adapted to be atiached to the lintel, a slidable member within said casing, a link cooperating with said and said siidable member within said tai-ing, the said link being secured to the end of slidable member and e3;- tending at substantiallyright angles thereto, springoperated means within said casing for returning said slidable men'iber to its normal position after the same has been moved by the opening of the door.

fr door check comprising an arm extending outwardly and upvf'ardly and adapted to be secured to the door, a casing adapted to be secured to the lintel of the door, a ,slidable rack within said casing, a link secured to the end of the slidable rack and extending right angles thereto and cooperating with said arm and a gear within said casing for operating said rack, a spring holding said gel. under tension and revolving said gear teturn thc rack to its normal position a'tcr the same has been moved outwardly by the movement of the door.

5. ri. door check comprisingnnarm adapted to bc secured to the door, a casing adapted to be seeu ed to the lintel ot the door, a chamber formed at one end of the casing and a sprico' operated gear within said casing, a slid` le. raclr bar withinsaid casing and in mesh with said gear, a linl; secured to the end of the raclrbar extending at ,right angles thereto and cooperating with said ann, and a friction brale secured to said casing, and in contact with said slidable rack t regulate he speed of the return of the to racit bar after the same has been pulled outwardljgT by the opening of the door.

G. il reversible door checl; comprising a casing having a chamber formed at one end. a gear within said chamber and a slidable rack bar within SaidY casing, the casing being 'l on its opposite sides so that it may be attached on one side or the other to the lintel dept-aiding on the hinged position of the door, a bral-e'adapted to be secured to one side or the other of the casing for operating on said rack bar, and a link slidably ..0 upon the ends of the rackv bar and capa le of rotation onsaidrack bar and lili] always extending at right angles to. the said rack bar and en arm adapted to be longitudinal axis of said rack bar, said link secured to the door and cooperate with said cooperating with an arm adapted to be link so that after said rack bar is operated l" secured to the door so that after said rack by an opening movement of the door, a

5 bar is operated by an opening movement of return of said rack bar will close said door. the door, a return of said rack bar Will close In testimony whereof I affix my signature. said door and a reversible link attached to f ALFRED SWANSON. 

